R-392/URR

by Josh Rovero, KK1D

Updated: May 2, 2015

The R-392 is the "little brother" of the famous R-390. It is
essentially a R-390 that is repackaged in a rugged and more compact
form factor for use in vehicles and field command posts. It operates
from 24-28 volt DC power with no vibrators, dynamotors or other voltage
converters. The radio's case has no vents (with proper connectors the radio is
immersion proof). Usually the inside of these radios is pristine no matter how
ugly the outside may be!

Very nice perspective
photo from Tom Norris' Mil List and KA1GTT.
Shows the ribbed style
case (there were other styles). Tom has also graciously provided
photos of the inside top
and bottom, plus the almost always
missing special tools of the R-392.

Barry Hauser bought a
completely solid-stated R-392 which also runs on 12 vice 28 VDC.
Here are photos of the front panel
and the IF/AF/PTO/Calibrator modules.
All tubes have been replaced by either single transistors or small
IC modules.

Mike Dinolfo has a nice
R-392 web page,
with details on component replacement and modifications.